Mr. Brainwash is the moniker of Paris-born, Los Angeles based filmmaker and street artist Thierry Guetta

According to the Banksy-directed film Exit Through the Gift Shop (2010), Guetta began as a proprietor of a clothing store and amateur videographer who filmed street artists through the 2000s and evolved into an artist in his own right after an off-hand suggestion from Banksy. Guetta was first introduced to street art by his cousin, the street artist Invader

Like his associate Banksy, Guetta employs famous artistic and historic images, many of which are copyrighted, and amends the originals in sometimes slight, sometimes significant ways. A number of critics have observed that his works strongly emulate the styles and concepts of Banksy, and have speculated that Guetta is an elaborate prank staged by Banksy who may have created the works himself. Banksy insists on his official website, however, that Exit Through the Gift Shop is authentic and that Guetta is not part of a prank